Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
  • F02M63/0012—Valves
  • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
  • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
  • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
  • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
  • F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
  • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
  • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
  • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
  • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
  • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
  • F02M59/48—Assembling; Disassembling; Replacing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
  • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
  • F02M61/161—Means for adjusting injection-valve lift
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
  • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
  • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
  • F02M63/0012—Valves
  • F02M63/0014—Valves characterised by the valve actuating means
  • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
  • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
  • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

• the present invention relates to a valve for controlling liquids according to the preamble of patent claim 1.
• FIG. 3 shows a valve 1 for controlling liquids, which has a hydraulic intensifier 2, which has a first piston 3, a second piston 4 and a pressure chamber 5 arranged between the two pistons 3, 4.
• the first piston 3 can be actuated via an actuating piston by means of a piezo element (not shown).
• the second piston 4 is connected to a valve member 6 via a tappet 11.
• the valve member 6 is pressed against a first valve seat 7 by means of a leaf spring 9.
• Plunger 11 lifts valve member 6 from first valve seat 7, thereby providing a pressure increase in an injection area of a valve needle to lift the valve needle from an injection opening and inject fuel into a combustion chamber (not shown).
• the elements of the valve described above are arranged in a holder 16, a valve piece 17 and an intermediate disk 18.
• the intermediate disk 18 has a throttle device 14 and a second valve seat 8, on which the valve member 6 abuts via the leaf spring 9.
• the position fixing between the first valve seat 7 and the second valve seat 8 must be carried out very precisely.
• the valve piece 17 and the intermediate plate 18 are connected to one another by means of dowel pins.
• the valve stroke of the valve is adjusted via the diameter of the ball. Since there are slight deviations in the position of the first valve seat 7 from the second valve seat 8 due to the manufacturing tolerances, valve members with different diameters must be kept available. Since the valve stroke is generally only 50 ⁇ m, a relatively large number of balls with different diameters and high tolerance requirements must be kept in stock.
• a stepped through hole is necessary in the valve piece 17 in order to allow the individual elements of the valve, i.e. the second piston 4, the plunger 11 and the valve member 6 to receive. Therefore, several steps are necessary to produce the stepped bore, which makes the manufacture of the valve complex and expensive.
• the valve according to the invention for controlling liquids with the features of claim 1 has the advantage that it has a separate setting element to adjust the stroke of the valve. This enables a through hole with a constant diameter can be provided and thus can be dispensed with the complex, graduated bore in the prior art. Since the valve stroke is adjusted using a separate setting element, the valve seat diameter always remains constant. Therefore, valve balls with different diameters no longer have to be kept in stock to set the valve stroke, since the same valve ball can be used in each valve. According to the valve lift is set by the separate setting element. Because of the constant
• valve according to the invention can thus be manufactured significantly more cost-effectively.
• the separate adjusting element is preferably designed as an adjusting ring. This enables a particularly simple and inexpensive construction.
• the valve lift is adjusted by the height of the setting ring in the direction of the valve axis.
• the valve according to the invention has a separate ring on which the first valve seat is arranged.
• a second piston, the separate ring and the valve member in the valve piece are preferably arranged together in a through bore with a constant diameter.
• a separate positioning element is preferably also provided.
• the positioning element is preferably used to position the separate adjusting element in the bore of the valve piece.
• the separate positioning element particularly preferably has a second valve seat. This makes it possible to dispense with an intermediate plate in the valve and thus to reduce the number of parts of the valve.
• a return element in particular a coil spring or a plate spring or a leaf spring, is preferably provided. Because of the simple design of the through bore, it is in particular possible to mount the restoring element either on the second piston or on
• valve member attack This results in additional degrees of freedom in the design of the valve and, depending on the intended use, the valve can be designed accordingly.
• the valve member is preferably spherical, hemispherical or essentially mushroom-shaped. This ensures according to the invention that the ball or hemisphere of the valve member only has to have a diameter, so that in particular the costs for storing different valve members with different diameters can be eliminated.
• connection between the separate ring and the bore of the valve piece and / or the connection between the positioning element and the bore is preferably designed as an interference fit. This eliminates the need for further assembly steps such as applying adhesive or connecting using screws. drawing
• FIG. 1 shows a valve for controlling liquids according to a first exemplary embodiment of the present invention
• Figure 2 shows a valve for controlling liquids according to a second embodiment of the present invention
• Figure 3 shows a valve for controlling liquids according to the prior art.
• the valve 1 comprises a holder 16, a valve piece 17 and a nozzle body (not shown), which e.g. are connected to each other by means of a nozzle clamping nut. Furthermore, the valve 1 comprises a hydraulic booster 2, which has a first piston 3, a second piston 4 and a pressure chamber 5 arranged between the two pistons 3, 4. The first piston 3 is actuated via a piezo element (not shown) which is arranged in the axial direction of the piston 3 on the side facing away from the pressure chamber 5.
• the valve according to the invention has a valve member 6.
• the valve member 6 is essentially mushroom-shaped and is formed by a hemisphere 6a and a cylindrical extension 6b.
• the cylindrical extension 6b has a smaller diameter than the hemisphere 6a and has a spherical section at its end.
• the valve member 6 rests with the hemisphere 6a in a first valve seat 7.
• the first valve seat 7 is formed on a ring 12 which is arranged between the valve member 6 and the second piston 4.
• the second piston 4 is connected to the valve member 6 via a tappet 11 and lifts the valve member 6 from the first valve seat 7 when actuated by the piezo actuator.
• the ring 12 has a through hole through which the plunger 11 is guided.
• a through bore 15 with a constant diameter is formed in the valve piece 17.
• the ring 12 is positioned in the through hole 15 by means of an interference fit.
• a positioning element 13 is arranged in the bore 15, which has a throttle device 14 and a second valve seat 8. The positioning element 13 is also introduced into the bore 15 by means of an interference fit.
• the valve member 6 can be brought into contact with the spherical end section of the cylindrical extension 6b with the second valve seat 8.
• an adjusting ring 10 is arranged between the ring 12 and the positioning element 13.
• This adjusting ring 10 has a small tolerance, in particular in the axial direction of the valve, so that it provides an exact position fixing of the two valve seats 7, 8 with respect to one another.
• a spring element 9 designed as a helical spring is provided, which is held in a spring seat 19 in the positioning element 13.
• the spring element 9 in ⁇ ti rö iH
• the first piston 3 of the hydraulic translator is arranged in a holder 16 and the second piston 4 is arranged in a valve piece 17.
• a stepped through bore 15 is provided in the valve piece 17 in the second embodiment.
• a first valve seat 7 is formed on an area of the through bore 15 with a small diameter.
• a simply designed valve ball 6 is provided as the valve member.
• a second valve seat 8 is formed on a positioning element 13.
• the positioning element 13 is fastened in the bore 15 by means of an interference fit.
• an adjusting ring 10 is arranged between the two valve seats. Depending on the height of the adjusting ring 10 in the axial direction of the valve, the valve has a corresponding valve lift of the valve member 6.
• valve member 6 is not directly connected to the spring element 9.
• a spring seat 19 is formed in the valve piece 17 such that the spring element 9 presses against the second piston 4 of the hydraulic booster 2. This makes it possible, in particular, to arrange a different starting position of the valve member and it is not necessary to provide a spring seat on the valve member.
• the present invention relates to a valve for controlling liquids with a piezo actuator and a hydraulic booster 2, which has a first piston 3, a second piston 4 and one between the has two pistons arranged pressure chamber 5.
• a valve member 6 is connected to the second piston 4 and can be brought into contact with at least one first valve seat 7.
• a separate adjusting element 10 is provided as a single component.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Manufacturing & Machinery (AREA)
• Electrically Driven Valve-Operating Means (AREA)
• Fuel-Injection Apparatus (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7645702

Family Applications (1)

Country Status (6)

Families Citing this family (5)

Family Cites Families (11)

• 2000
  • 2000-06-14 DE DE10029296A patent/DE10029296A1/de not_active Ceased
• 2001
  • 2001-05-23 JP JP2002510828A patent/JP2004503709A/ja active Pending
  • 2001-05-23 EP EP01947164A patent/EP1295026A1/de not_active Withdrawn
  • 2001-05-23 US US10/049,603 patent/US20020134954A1/en not_active Abandoned
  • 2001-05-23 CZ CZ2002503A patent/CZ2002503A3/cs unknown
  • 2001-05-23 WO PCT/DE2001/001960 patent/WO2001096733A1/de not_active Ceased

Non-Patent Citations (1)

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